Issue #2098375 by sdboyer: Add gliph to composer.

composer.json

composer.lock

core/vendor/autoload.php

core/vendor/composer/autoload_namespaces.php

core/vendor/composer/autoload_real.php

core/vendor/composer/installed.json

core/vendor/sdboyer/gliph/README.md

core/vendor/sdboyer/gliph/composer.json

core/vendor/sdboyer/gliph/composer.lock

core/vendor/sdboyer/gliph/phpunit.xml.dist

.../sdboyer/gliph/src/Gliph/Algorithm/ConnectedComponent.php

.../gliph/src/Gliph/Exception/InvalidVertexTypeException.php

.../gliph/src/Gliph/Exception/NonexistentVertexException.php

...sdboyer/gliph/src/Gliph/Exception/OutOfRangeException.php

...or/sdboyer/gliph/src/Gliph/Exception/RuntimeException.php

.../gliph/src/Gliph/Exception/WrongVisitorStateException.php

core/vendor/sdboyer/gliph/src/Gliph/Graph/AdjacencyList.php

...r/sdboyer/gliph/src/Gliph/Graph/DirectedAdjacencyList.php

core/vendor/sdboyer/gliph/src/Gliph/Graph/DirectedGraph.php

core/vendor/sdboyer/gliph/src/Gliph/Graph/Graph.php